Traction control issues

Anybody else with Trac going off when it doesn't need to after putting bigger tires on? Techstream shows the wheel speed difference is outside of the parameters going into turns when the nose dives. (My truck doesn't dive much with the rear sway bar and bags had Lotsoftoys do the zero point calibration and alignment.no change. No issues from the lift, only the tires. 285/70/18 on stock wheels.

 

I had the problem when I had MTs on my truck, I'd accelerate getting on the interstate or even when changing lanes to pass a vehicle and the stupid thing would kick in but after changing to ATs I haven't had a problem with it at all.

 

Yeah, like I said I have been playing with tire pressure. The trac situation is acceptable at 30 psi but that is a little to low for good handling and tire wear. It went away completely at 25 psi. Not the solution unfortunately. I was hoping the speedo calibrater would help, but according to hypertech it doesn't. I might have to talk to discount and see if I can trade for different tires. I don't want to though. I love the look and the truck drives great except for the trac crap.

 

That's what others have said. Maybe I need to talk to someone else at hypertech. The guy said it doesn't hook up to the computer system. So the question is, how does the computer receive the tire speed data that tells the trac What to do?

 

What about road force balancing? I wonder if that would help.

 

Haven't done any wheeling. Don't have any shaking that would indicate an out of balance tire. Kind of grasping at straws here.

 

Dave at Lexota said he has seen a couple guys have issues just by going to E rated tires without a big size difference. Others have much bigger tires and no issues. This crap has really got me scratching my head.

 

Wheel offset? Sequoia front swaybar to reduce body roll in front with the back being stiffened?

 

Nitto exo grappler a/t. So, no not running big blocky tread. But somewhat aggressive. I don't think it's from a loss of traction. In fact, I can get the rear end to break loose sometimes without the trac going off!

 

Like I said before, Techstream shows that the wheel speed difference between front and rear, side to side is outside of the parameters. That was with the tires at 30 psi!

 

I'm going to call discount and see if I can get them to swap out for a different tire. I've only put 1300 miles on them. So, maybe not to late.

 

Don't know if that would do anything. Had the zpc done after tires and lift with no change.truck still has rake. 2.5 frt and 1.5 rear lift. No problem with anything until the tires. On my way to discount now. Maybe just a slightly off tire. Wish me luck!

 

At discount tire now. Now the guy here is grasping at straws. He's talking about his dads dodge having a trac issue that turned out to be the wheel bearings. My truck has 26k on it, doubt the bearings are bad. Gonna have them do a road force balancing and rotate, see if that does anything. If not I'll put the stock wheels and tires on, see if that does it, then probably swap out to a different tire.

 

Yeah, I might go to a 285/65/18. There's a lot more choices than with the 285/70 and they're about an inch shorter. Should still look good with the mild lift I've got.

 

I wonder if you have a bad sensor? I can't imagine the tires are causing this. So strange.

 

I had my truck lifted 4 inches and put on new wheels and toyo open country 35 x 12.5. Since the lift and tires 3 wks ago, my traction control has gone off 2-3 times when I made a quick turn downhill. I out the rear sway on from hellwig and it has not gone off again.

Also, an option may be to pull the traction control fuse!!

 

Wouldn't have Techstream shown a bad sensor? Talked to one of the guys at discount and he said that a 33.5 is the biggest that is within Toyota specs. They had that info on hand when I got the 34 inch but didn't bother to mention it. Fuckers offered me $118 a piece in trade for tires I just gave them $270 for! 1300 miles but I bought them in Nov. So no go on just getting a size shorter. Maybe I should just live with it till they wear down some. Gonna check with the shop next door to discount. Dude said they put the lifts and way bigger tires on our trucks for the dealership. Seems like there's gotta be a way to adjust the system so the trac works right. I don't think the dealership would want to sell brand new trucks with the trac going crazy.

 

So what happens when you turn off all the nannies?

 

Nannies off, no noise at all. If it was easier to turn them off, I would just do that unless the weather was crappy. Don't really want to go and just disable the trac altogether. Pulling the fuse would probably throw codes and what not.

 

That's what I'm saying. There's a butt load of us running 34.5+ with absolutely no problems. Mine has never gone off, not once.

 

Sean, does Toytec have the nessary equipment to diagnose it? RSG at Colfax and Kipling is a lot closer to me and so is Stevinson. I'm waiting to hear back from Lotsoftoys to see if he has any ideas. He seemed just as stumped as me last time I asked him.

 

Yep, the abs grinding and trac light flashing. It doesn't feel like the abs is engaging though.

 

Here I was thinking going conservative with the lift and tires and I wind up with more issues than everyone running bigger tires, more lift and less offset!

 

Yeah I would try zero point again. But if you can't fix this, you might want to do something like this. This is for a 2nd gen, but I'm sure you can do the same or similar on a 3rd gen.

 

Oh never mind you have a 2nd gen... perfect.